Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89a2542746a462987f9666225b6bfcf50407db24c5c8049556e78ba62e228c31' 
  AND token = 'U/Db+TuXnFFFqfsaAqEuLAFZgFOutcgA4fO6V8hDBZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}